John and karen are each saving money at their own constant rate. when john has saved $15, karen has saved $18. how much will karen have saved when john has save $45

Matilda and kathryn went on different road trips over spring break.the equation below represents the number of miles matilda drove in x hours.y = 60xthe table below shows the number of miles kathryn drove in x hours.time(in hours)distance(in miles)114228342456who drove at a greater speed? a. matilda drove at a greater speed.b. matilda and kathryn drove at the same speed.c. kathryn drove at a greater speed.d.there is not enough information to determine their speeds

Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7